Finding the Fourth Proportional to 51,217.48, 70,667.94 and 28,861.48

Step by Step Solution

1. Step 1: Write the proportion equation
   51,217.48 : 70,667.94 = 28,861.48 : x
2. Step 2: Convert to fraction form
   51,217.48/70,667.94 = 28,861.48/x
3. Step 3: Cross multiply
   51,217.48x = 70,667.94 × 28,861.48
4. Step 4: Simplify right side
   51,217.48x = 2,039,581,336.95
5. Step 5: Solve for x
   x = 2,039,581,336.95/51,217.48
6. Step 6: Final answer
   x = 39,821.98